package com.system.permissiondemo.util;

import java.util.Date;
import java.util.Random;

/**
* @Description:    密码生成工具
* @Author:         Joe
* @CreateDate:     2020/3/26 14:50
*/
public class PasswordUtil {

    public final static String[] word = {
            "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K","L", "M", "N", "O", "P", "Q","R", "S", "T",
            "U", "V", "W", "X", "Y", "Z", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n",
            "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"};
    public final static String[] num = {"2", "3", "4", "5", "6", "7", "8", "9"};

    /**
     * 生成密码
     * @return
     */
    public static String randomPassword(){
        StringBuffer stringBuffer = new StringBuffer();
        Random random = new Random(new Date().getTime());
        boolean flag = false;
        int length = random.nextInt(3) +8;
        for (int i = 0; i < length; i++) {
            if (flag){
                stringBuffer.append(num[random.nextInt(num.length)]);
            }else {
                stringBuffer.append(word[random.nextInt(word.length)]);
            }
            flag = !flag;

        }
        return stringBuffer.toString();
    }

}
